Bolt and nut lock.



I0 IODEL.

. PATENTB'D MAY 24, I904.

, w. H; SMITH} BOLT AND NUT 1.001;.

APPLICATION I'ILE D JAR. 2'6, 1903.

WI TNE SSE S:

' JJTTORNEYS. j

' from the threaded aperture to the perimeter UNITED STAT S fatented May24., 1904.

WILLIAM H. SMITH, OF

SYRACUSE, NEW YORK.

BOLT AND NUT LOCK- SPECIFICATION forming part of Letters Patent No.760,812, dated May 24, 190.4.

Application filed January 26, 1903.

To all whom it may concern:

Be it known that I,"WILLIAM H. SMITH, of Syracuse, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements inBolt and Nut Locks, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

This invention relates to improvements in nut-locks in which a keyismovable endwise in a suitable seat provided in a bolt and engaged undera spring tension with the nut.

The object of this improvement is to provide a key with a yieldingengaging end which is adapted to be driven into the seat, so that whenit is in operative position the yielding end will automatically springinto a groove provided in the inner end face of the nut.

Referring to the drawings, Figure 1 is an elevation, partly in section,of a-bolt and nut, showing the key in its operative position. Fig. 2 isa perspective view of the detached bolt, showing particularly the seatfor the key. Figs. 3 and 4c are opposite face views in perspective ofthe nut, showing the grooves or recesses which receive the opposite endsof the key. Fig. 5 is a perspective view of the detached key.

Similar referencecharacters indicate correspondingparts in all theviews.

In carrying out the objects of this invention a bolt 1 is provided witha head 2 at one end and with a lengthwise slot or key-seat 3 extendinginwardly'from its opposite end, this latter end being threaded toreceive a nut 4. The outer end face of this nut is provided with one ormore radial grooves or recesses 50f substantially uniform depth, whichextend thereof, and the opposite face is also provided with one or morerecesses 6, which are preferably radial and extend outwardly from thethreaded aperture, the outer walls of these latter recesses beingbeveled or inclined.

A key 7 is inserted in the key-seat 3, and. the central portion or mainbody 8 of the key is substantially the same depth as the key-seat, andits outer end is provided with an inclined shoulder 9, which enters agroove 5 of the nut,

\ahieh may be alined with the seat. The op- J Serial No. 140,558. (Nomodel.)

posite or inner end of the key 7 is preferably thinner than the mainbody for forming a yielding spring-shoulder l0, which-normally inclinesoutwardly from the main body 8 and operatively enters the recesses 6 tohold the key from displacement and also to additionally hold the nut andbolt from rotation relatively to each other. These keys are usuallyformed of substantially the samelength as the thickness of the nut andare usually driven in place,

. angular space 11 is left between the inner wall of the recess 5 andadjacent beveled face 9,

the shoulder 9 serving to limit its inward the object of this being topermit the insertion of a suitable tool whereby the key may bewithdrawn, if desired.

The operation of my invention will now be readily understood uponreference to the foregoing description and the accompanying drawlngs. r..Having thus described my invention, what I claim, and desire to secureby'Letters Patent, is

. In a bolt and nut look, a bolt having a lengthwise key-seat, a nutmounted on the bolt and provided with recesses in its opposite facesalined with theseat, a key inserted in the seat:

and having a yielding inner end tensioned to spring outwardly into theinner recess of the nut and its outer end provided with a beveled faceprojecting into the outer recess of the nut and forming an angular spacewith the inner wall of said outer recess.

In witness whereof I have hereunto set my hand this 13th day ofDecember, 1902.

WILLIAM H. SMITH.

